Answer:
16 feet
Step-by-step explanation:
We know that:

We can solve for
which results in:

Where
is displacement,
is velocity and
is time.
Since John is travelling 8 feet per minute to east for 2 hours. Therefore, our velocity will be 8 m/s (Define that west is negative and east is positive) and time will be 2 hours.
Substitute in the formula:

Therefore, his displacement will be 16 feet.