[JasonC]

No, doesn't follow. The primary determinant of sword length is not a man's height, but how the sword was used, tactically. Swords meant for fighting from horseback against infantry are not the same as swords meant for infantry with shields trying to get inside the reach of other infantry with spears, and neither are the same as swords meant for aristocratic dueling one on one, in little of no armor. Tactics change with every shift in weapons, armor, and the social organization and mobilization of armies. They will bounce around like hem lengths, not track average height.

[CatoRenasci]

Yes, of course, but knight's tactics were fairly consistent from the 11th through 15th centuries.