Will sleeping for more hours than usual help me grow taller?

You did not mention your age, however, sleep can be used to increase height. Try not to get less than seven and a half hours of sleep each night. Apart from sleep, ensure that your diet includes sufficient
protein and calcium. 

There are also stretches that you may do to grow taller. One is
to lie face down on the floor  with palms on the floor beneath your shoulders.  Arch your spine up slowly, leading with your chin.  Arch as far back as you can. Each repetition should last between 5 to 30 seconds.

Depends on your age. If you are a boy you will stop growing at 24 but if you are a girl, you will stop growing at 18. But true, growth is at its peak while you sleep.