What dose 5 above and tdc and 5 below mean on a timing chain for dodge ram 360?

What dose 5 above and tdc and 5 below mean on a timing chain for dodge ram 360?
This means the same on all piston operated engines. TDC means Top Dead Center, or the peak height of the piston travel. 5 above or below would relate to the crankshaft, that is that amount from the peak travel