Then I suspect you have a jet pump, by the pressure tank now. If so, the pressure switch and electrical will stay at the pump; unless you move the pump too. Which can be done too IF, the pump can still suck water from the additional 5' of elevation. Question, how can you go up one story and it be only 5'? A story is usually considered to be 9-10'. Dependending on how far you move the tank upwards from the pump, you may have to raise the pressure switch settings a few lbs.. If you have a submersible pump, just move the tank and pressure switch as far as you want to.