You need a speaker held high above your head to sound taller

You'd sound insecure and edgy

Just use centimetres and never have to worry about it again

Like you’re speaking aloud an actual equation? If so, then definitely not. You’ll get called on it the first time someone who actually is 6’ is around, and to draw attention to it like that in the first place is going to sound defensive.

Best to just go about life imo, it projects more confidence, and confidence will do way more to make you seem taller than specifying that you’re four inches off from 6’ ever could.

Um... No. You won't sound taller no matter what words you use, if we can see you. You are 5ft 8in.

If you're doing that, you would sound even taller if you say your height is 10 feet. Maybe you should try that.

But if you're going there already, why not say you're 10 yards high? Might as well go big or go to your over-10-yard-high home.

Telling tall tales about your height? Not a sign of greatness

No, but I bet it would get a laugh.

Would probably work better if you pretend You don’t actually now the numbers but instead compare it something else.

About 10 stacked pumpkins or enough to reach things standing on top of my closet.

You don’t need to lie, just find something that is hard to reference to others but sounds tall.

Go to a store and find any double door fridge with your height. Now you are as tall as a big fridge.

Anyway, i find peoples obsession with Height in romance incredibly strange.

If you go metric you’ll sound even bigger as 172 is bigger than 5.something. But to answer your question, it’ll only work until people meet you as 8”/20 cm is quite the difference and they will notice. Plus you’ll get the added benefit of being untrustworthy because you’ll lie about such a basic and easy verifiable fact.

Do it like people do with the time: e.g. 8:45 => quarter to 9.

Regarding your edit: Own your funniness. Look how many people made jokes of their own because of yours. If you had just said "oh it's a stupid idea" and disregarded it, none of this would have happened.

Just give your height in centimeters instead.

Wait, are you a lady? Just say you are 5'10". I'm about your height and guys are always telling me I am at least 5'10".

You would be lying, and I think honesty is more important.

5'8" is above average for a woman where I live. 6'4" is gargantuan. Like unusually tall.

I see your gender identity tag as including they... if you were AMAB, you might be considered short for your birth-assigned gender, but if you truly are AMAB and trying to present as female, being 5'8" would be helpful; being 6'4" would be a hindrance in addition to being a falsehood. (Apologies if I've misread the situation.)

If you're talking to a blind person, yes. You can even tell them you're 10ft tall.

I however can tell the difference between 5'8" and 6'4".