The Move Entity Up command is used to increase the elevation of an entity on the drawing.
To move an entity up, go to
Ribbon: DM HVAC->Drafting-> 
Move Entity Up
Pulldown Menu: DM HVAC->Drafting Tools->Elevations->Move Entity Up
You will be prompted to select the entities to be moved up.
Select entities to move:
You will then be prompted to specify the distance the entities are to be moved.
Enter distance to move up:
Their elevation will be increased by the specified distance.