Answer
The ACT math score. This score is relatively higher compared to the mean than the SAT score.
Work Step by Step
Let's find the z-scores:
SAT math score:
$z=\frac{x-µ}{σ}=\frac{610-515}{114}=0.833$
This means that his SAT math score is 0.833 standard deviations above the mean.
ACT math score:
$z=\frac{x-µ}{σ}=\frac{27-21.0}{5.1}=1.176$
This means that his ACT math score is 1.176 standard deviations above the mean.
