I need assistance with this problem. Please include step by step instructions, thank you!

Cristina finds that in a suburb of Salt Lake City, the weekly salary for a basic office worker has a normal distribution with a mean of $355 and a standard deviation of $31. The highest 15% of weekly earners are not eligible for a raise (so the top 15% of all the salaries can't get a raise). What weekly salary does a worker have to earn to make them not eligible for a raise?

Solve this problem by hand and round the answer to the nearest whole number.