The average (arithmetic mean) of a normal distribution of a

The average (arithmetic mean) of a normal distribution of a school's test scores is 65, and standard deviation of the distribution is 6.5. A student scoring a 78 on the exam is in what percentile of the school?
A)63th percentile
B)68th percentile
C)84th percentile
D)96th percentile
E)98th percentile

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