To find the location of Point B, we start with the location of Point A, which is at -15.
Point B is described as being 99 less than Point A, so we can calculate the location of Point B by subtracting 99 from the location of Point A:
\[ \text{Location of B} = -15 - 99 \]
Now, perform the calculation:
\[ -15 - 99 = -114 \]
Therefore, Point B is located at -114.