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I need some help understanding this, my tutor got it wrong and it didn't help. The first statistics exam had a mean of 68 and

I need some help understanding this, my tutor got it wrong and it didn't help.

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The first statistics exam had a mean of 68 and a standard deviation of 16 points, the second had a mean of 80 and a standard deviation of 3 points. Anna scored a 84 on both tests. Megan scored 94 on the first exam and 74 on the second. They both totaled 168 points on the two exams, but Anna claims that her total is better. Explain

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