Is it possible to install Shareplex remotely on a machine?
It is not possible to install Shareplex remotely on a server. You can only install it on a local machine where you run the installation binaries.
The Release Notes section in Shareplex 8.6 titled "Remote installation and connection" means that SharePlex can now be installed on a machine and can connect remotely to the Oracle database by using a tns_alias. It does not mean that one can install Shareplex remotely on another server by running the .tpm file on a different server.