can someone help me set this up to solve. i know i had missed this on one my previous exam, and trying to study for tomorrow final exam.

scores on a test are normally distributed with a mean of 65.3 and a standard deviation of 10.3. find p 81 (percentile 81) which separates the bottom 81% from the top 19%,

the answer is 74.4

how do i sovle for the percentile.