Theres a simple way to do this in Word: number your paragraphs, then sort them by number.

Before I knew it, an entire section of my paper would be disorganized.

Your number will be left as you typed it.

Your paragraphs are automatically rearranged in the order you assigned.

Check out the full post for more detail.

How to Easily Change the Order of Paragraphs in a Word Document|How-To Geek

Screenshot via How-To Geek.