Jack took an exam in his math class and received a 58/70. He thought this was a good score, but he wanted to know how high his score was in relation to the rest of the class. His professor said his Z score was 1.4. How should Jack interpret his Z-score?

A. Jacks score is 23 points above the class mean.

B. Jacks score is 14% above than the class mean.

C. Jacks score was 1.4 standard deviations above the class mean.

D. Jacks score is 82% from the class mean.