If you’re talking about moving point of impact on target (say you shot, measured w/ a tape and 3” below target).
At 100yds, using IPHY, then you’re 3moa below target. 8 clicks required to make 1 moa on your scope, so you add 3 moa (which is 24 clicks).
Inside of 100 yds (because we’re assuming a standard of 1” @ 100 yds):
At 25 yds, if you hit 3” low, you need 12moa up. 100yds / 25yds = 4. 4 x 3” = 12 moa. Add 12moa to scope (96, 1/8 moa clicks).
At 50 yds, if you hit 3” low, you need 6 moa up. 100yds / 50yds = 2. 2 x 3” = 6 moa. Add 6moa to scope (48, 1/8 moa clicks).
At 75 yds, if you hit 3” low, you need 4 moa up. 100yds / 75yds = 1.33. 1.33 x 3” = 4 moa. Add 4 moa to scope (32, 1/8 moa clicks).
Outside of 100 yds:
At 200 yds, if you hit 3” low, you need 1.5 moa up. 100yds / 200yds = 0.5. 0.5 x 3” = 1.5 moa. Add 1.5 moa to scope (12, 1/8 moa clicks).
At 563 yds, if you hit 3” low, you need 0.5 moa up. 100yds / 563 yds = 0.18. 0.18 x 3” = 0.5 moa. Add 0.5 moa to scope (4, 1/8 moa clicks).