Stealth blocked ports and running apache server

I have a normal internet connection on my pc.  In addition to that, I want to run apache server on the pc and have access to it only on the pc.  That is use http://localhost/index for example.  My question is: Will the stealth blocked ports turned on prevent anyone out on the internet from getting to apache?  Currently apache is set to listen on port 80 and is named localhost.  The info for 'stealth blocked ports' seems to say that any attempt from the outside to connect to port 80 will be block and so my pc will remain secure.  Is this correct?  Or, must I somehow configure apache to ignor any requests from outside my pc?  Thanks.