Assume that adults have IQ scores that are normally distributed with a mean of 95.2, and a standard deviation of 22.2 Find the first quartile Q1, which is the IQ score separating the bottom​ 25% from...

Assume that adults have IQ scores that are normally distributed with a mean of 95.2, and a standard deviation of 22.2

Find the first quartile Q1, which is the IQ score separating the bottom​ 25% from the top​ 75%.

Can you please provide step by step using the T1-84 plus calculator.   I keep getting stuck on locating the z-score.  I know the first Q is .25

If you use the formula, please provide the actual figures including a picture- so I have a well-rounded answer to this question.

Thank you