According to the bell curve, I can't possibly be better than 98.5% of players.
My daily chess percentile is wrong
Who knows, if you hover your mouse over the curve you can see the value for the selected 100-point wide rating range. If you sum all values up you will get only 2.9M while it states almost 10.4M players below the chart:

Perhaps it is quite the opposite: the curve shows only active players while the percentile is calculated for all players