The probability is 0.9958.
We first find the z-score associated with both of these values, using the formula
.
For the lower score, we have:
Using a z-table (http://www.z-table.com) we see that the area under the curve to the left of, less than, this is 0.0021.
For the upper score, we have:
Using a z-table (http://www.z-table.com) we see that the area under the curve to the left of, less than, this is 0.9979.
To find the area between these two, we subtract:
0.9979 - 0.0021 = 0.9958