What energy is calculated from an object's mass height and the acceleration due to gravity?

Gravitational potential energy is the energy calculated from an object's mass height and the acceleration due to gravity. 
The gravitational potential energy is the energy an object has as a result of the position of the object in a gravitational field. Every object on the surface of the Earth has gravitational potential energy. The formula for calculating this energy is
Ep=mgh
where m is the mass of the object, g is the gravitational acceleration (9,8 m·s−2) and h is the height from the reference point 

Answer8.0m;