GMAT test

In 2018, a population of 1,500,000 students took the GMAT test. The distribution of scores in the math section of the test follows a normal distribution with mean µ = 600 and standard deviation ? = 120. a)      Calculate the Z-score for a test score of 480. Interpret it using a complete sentence.b)     The GRE math test is an alternate to the GMAT. The test score for the student who did GRE instead of GMAT is also normally distributed with mean µ = 20 and standard deviation ? = 6. If the score of one student who has done both GMAT and GRE test is respectively 650, and 22, in which test he has performed better?