"Ports" are related to TCP, UDP, or the lesser-used SCTP. Traceroute has nothing to do with detected port 80. The purpose of TraceRoute is to see which router drops packets. (Traceroute is also rather useless for connection difficulties between devices within a single subnet.)
This means that my ISP is blocking incoming connection from port 80 (http)?
Sounds like it, unless you can reach other sites at port 80. Note, I'm not meaning to say that they are intentionally blocking it. I'm just saying that the effect is essentially equivalent. It might be a routing issue.
Contact your ISP. If this is your phone company, then, having some experience, I would say that you may need to move beyond general "customer service" to speak to a "technical support" representative.
ISPs can generally either fix things, or help to identify that the problem is remote for the ISP (which is also helpful information). In some cases they may be able to identify what company's behavior has a problem, and either let you know that or maybe even contact that company and help to get the problem resolved.