how to customize page title in SHOP page

Hi,

I’m having difficulty in finding where to customize the page title in my shop page.
I want to remove the background image and replace it with a background color and at the same time reduce the height from large to normal.

You can check out my SHOP page below:
http://www.handsonparentwhileearning.com/shop

I’m thinking if I can modify this for my shop page, I can also do the same for my products page.

Thanks.