[Suicide Junkie]

The longer explanation is that the tidal forces between the earth and the moon slow down the earths rotation which reduces its angular momentum, but angular momentum must be conserved so the earth moves farther from the sun (creating a longer angular arm). Moving away from the sun means the earth's orbit must slow down to remain stable (but not as much as the angular arm increases angular momentum).

The tidal forces between the earth and moon have no effect on our distance from the sun.

It does cause the moon to spiral outwards and the Earth's rotation (length of day/night) to slow, though.

The tides induced by the sun are a smaller effect, and those forces are exerted on a much heavier body...
If I recall the spin directions correctly, the solar tides would tend to push the earth in an outward spiral...