In following instructions on reordering modules I am told to go to Module Manager through Extensions but I don't see it and when I click on Modules I go to Module (Site) is that the same. I am using Joomla 3.5.1
They renamed it to just "Modules" instead of "Modules Manager". Go to:
1) Extensions (top menu)
2) Modules (sub menu)
3) Click the Ordering column's (far left column's) title, which is two arrows - one up and one down. That will allow you to reorder the modules by dragging and dropping.
Hope this helps! Let us know if you have any questions and we'll be glad to answer.