Answer: 0.997 approximately
Explanation
Notice the gap from 35 to 62 is 27 which represents 3 standard deviations (since 3*9 = 27). The same can be said about the gap from 62 to 89.
Therefore if 35 ≤ x ≤ 89, then x is within 3 standard deviations of the mean.
Use the Empirical Rule to determine that roughly 99.7% of the normally distributed data values are within 3 standard deviations of the mean.