Well, I suspect the total motion is less than 6,000 miles as Ellesmere Island isn't RIGHT at the north pole today, and it didn't have to be RIGHT at the equator...just near it...375 million years ago. so maybe actually 5,000 miles.
But 2.2 inches a year is a typical plate motion speed; North America is moving about that fast right now. The fastest plate in the world is moving over 9 inches a year.
Makes one giddy just thinking about it. Why aren't continents throwing up bow waves in the ocean? Where is the wake? (OK, that's an Island in the Pacific.)