You can put this solution on YOUR website!
I'm no sure what you're doing, but if you want to move the point to the right 4 units and down 3 units, then the new point will be at (1,-8)
(x,y) = (-3,-5)
(x+4,y-3) = (-3+4,-5-3) = (1,-8)
Along the x-axis, going to the right is adding units and going to the left is subtracting units.
Along the y-axis, going up is adding units and going down is subtracting units.