Hello!
The mean is 86 and the standard deviation is 3
You see how many deviations are between 86 and 89
86 + 3 = 89
From the median to the first deviation is where 34.1% of the results fall
Convert the percent to a decimal
34.1% = 0.341
Multiply this by the amount of test taken
200*0.341 = 68.2
The answer is B)68
Hope this helps!