The Mean Test Score on a Statistics Test Was 72

The mean test score on a statistics test was 72 with a standard deviation of 10.How many standard deviations from the mean is a test score of 90?

A) 1.80 standard deviations above the mean
B) 1.80 standard deviations below the mean
C) 0.69 standard deviations above the mean
D) 0.80 standard deviations above the mean
E) 0.69 standard deviations below the mean