Sent this to my friends flexing a "top 65%" score. The site didn't make it clear that's not a good thing.
(files.catbox.moe)
It seems that IQ tests are always used with a normal distribution.
I don't know whether IQ/intelligence is actually normally distributed, but it seems that IQ test results are.
To find a graph that better matches what you described, you might be interested in https://en.wikipedia.org/wiki/Cumulative_distribution_function and/or https://en.wikipedia.org/wiki/Skewness