The 
and 
orbitals (i.e., eg set), which point towards the axes along the direction of the ligand, will experience more repulsion, and will be raised in energy.
From the above statement:-
Why energy raises with more repulsion??
The solution is as follows:
1. There is least energy associated with stable systems and maximum energy with the most unstable systems. This is because, an unstable system gains energy from surroundings to rearrange and form a stable system.
2. Positive attracts negative and they neutralise itself to become a stable system. While like charges repel each other and try to stay as far as possible. Due to this, the system gains energy as like charges apply force to repel each other.
3. Thus, when electrons approach electrons, the energy increases in the system.
1. There is least energy associated with stable systems and maximum energy with the most unstable systems. This is because, an unstable system gains energy from surroundings to rearrange and form a stable system.
2. Positive attracts negative and they neutralise itself to become a stable system. While like charges repel each other and try to stay as far as possible. Due to this, the system gains energy as like charges apply force to repel each other.
3. Thus, when electrons approach electrons, the energy increases in the system.