Open your Word document and click on the picture or graphic you want to move. You will see the edit outline around your graphic. Now left click the top green knob and hold the object and start to rotate it.
Below you can see the graphic start to move.
In the second picture here I added an object and am rotating it as you will notice the first graphic is at an angle.
Here is the result of a couple of simple objects in a Word 2007 document that I rotated around a bit so you have an idea.
You can do this with any picture, graphic, and even text!