Lets further clarify what you have done and what are trying to do:
1- You can read in the serial data steam into bytes. yes?
2- You now want to display (send to PC) the value of these bytes.
3- You want to see these bytes in a Text format such as 6C.
4- To do that you need to convert each nibble (4 bits) of each byte into an ASCII character representing the hex value.
5- This is a very common thing to do so search for “hex to ASCII conversion” for arduino.
OR is this not the problem?
1- Is it that you can not get the arduino to read the serial data stream correctly?
2- For that search for “bit banged” serial receiver code or IR remote serial receiver code.
3- This would be an arduino code project.