You will need to either change the port number used by your Weblogic instance, or the port number used by your other product/service using it.
To modify the port number for your Weblogic instance, follow these steps:
Open the Management Console, and locate Server configuration.
In General tab, change the values for Listen Port and SSL Listen
Port if SSL Listen Port is enabled. Make sure that the ports to be used
Restart the server to apply the changes