No idea what the actual amount would be, but it would certainly be higher. The moon is moving away from Earth at about 4 m per 100 years.
I read somewhere that tides used to be 300 m high , shortly after the Moon was formed .
But maybe someone can tell you for sure .
The attraction force varies with distance according to the inverse square one . In other words , to calculate the attractive force , d is in the denominator of the formula and is square . Halving the distance that increases the attraction force by a factor of four. Tides rise and fall would agree. What would be a 5-foot wave is now 20 .
Because of the inverse square rule (pertaining to gravitational attraction versus distance) tides would be four times higher. At that nearer distance, the "Month" would be shorter, so Neap and Spring tides would come more often.
Neap tide occurs when the moon and sun are at right angles in our sky, and so the gravitational attraction of one partly cancels that of the other; spring tides are when the sun and moon are either on the same side of the Earth or on opposite sides, so their attraction adds up. Spring tides are usually higher than neap tides.