The lithospheric plates move an average of

About 5 to 10 cm per year.

Explanation:

As the earth is continuously evolving the plates are dynamical in motion and they can move at a rate of 4 inches per year and most of them have different speeds as they move in different direction either colliding or drifting away or sliding past one another they cover 40 % of the land surface and rest is covered by the oceanic plates. Thus creating faults and fold kin the landscape of the earth.