please help this is statistics homework and I’m not sure how to calculate the answer for this chapter homework problem………..

Question 5 __,1 A study has shown that 22% of all college textbooks have a price of $70 or higher. It is known that the standard deviation ofthe prices of all college textbooks is $9.50. Supposethe prices of all college textbooks have a normal distribution What is the mean price of all college textbooks? Round your answer to the nearest integer‘ Hint eTextbook and Media Attempts: 0 of 2 used Check AnswerSend to Grade-hook