I do not understand how they are getting their x values to get to the end of the problem. Thank you

STAT_211_March_2021_Balkaran_0004 Joseph Crinite & | 04/15/21 4:46 AM Homework: Module 4 Homework: Textbook Chapter 6 Save Score: 0 of 2 pts 32 of 50 (32 complete) HW Score: 62%, 62 of 100 pts X 6.2.10-T Question Help Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. 0.2525 X The indicated IQ score is . (Round to the nearest whole number as needed.) Enter your answer in the answer box and then click Check Answer. ? All parts showing Clear All Check