In the Appearance > Customize > General Options > Typography I am trying to have any and all headers and titles in the site set to Arial / Helvetica and all body text to Georgia. 

When I select those two from the drop downs, it doesn't change the typography throughout the site.  I am still required to go into each individual block or fancy header and change fonts.  When I do that, Arial / Helvetica is not a drop down option for headers and titles.

1.  How do I access Arial / Helvetica in the individual blocks/portfolio, etc.?

2.  Is there a way for me to change it site wide from in the Customize section without having to into each individual block/portfolio, etc?

Thank you so much; you guys do a great job of support.

I am sorry, I am not really comfortable doing that.  

Attached is a sample of the drop down in Portfolio Settings that I am referring to - there is no Arial / Helvetica option in these types of drop downs as far as I can tell.  I think I can only choose it from Customize > General Options.  The image attached isn't the full scroll of options, there are a couple more but Arial is not one of them.