Question

if he is pulling on the earth, then why doesnt the earth move?
the earth is a fixed object in space.
the forces are balanced - plus, the earth just has so, so much inertia
gravity can only pull down.

Explanation:

The Earth is not a fixed object in space. Gravity is a mutual - force and can act in different directions. The reason the Earth doesn't noticeably move when a person pulls on it is that the forces are balanced and the Earth has a large amount of inertia (resistance to change in motion).

Answer:

The forces are balanced - plus, the Earth just has so, so much inertia