If you would like to rearrange the order of your pages,  you can go to Appearance>Menus and create a custom menu by:

• naming your menu
• selecting all of your pages and adding to the menu
• rearranging the order of your pages by dragging and dropping
• selecting the custom menu as the primary navigation and saving your settings

Tip: You can also add custom links and categories to the custom menu.

Disclaimer: the feature of creating a custom menu depends on a theme.