You can use
\ to escape any single character,
) included as you already do with spaces. While it works, it can be cumbersome if you have lots of characters/spaces to escape.
A faster alternative is to use single quotes (
') to escape the whole string, i.e. something like:
rm -rf '10.2 (14C92)'
Please keep in mind that
' escape everything, so use it with care if you need, for example, variable expansion inside the quotes. That said, using double quotes works for escaping spaces and parentheses, also:
rm -rf "10.2 (14C92)"
Also, based on your question, you try to use
rmdir works only for empty directories and it doesn't have
rmdir - remove empty directories
rmdir [OPTION]... DIRECTORY...
Remove the DIRECTORY(ies), if they are empty.
You'll want to use
10.2 (14C92) is indeed empty, a simple
rmdir '10.2 (14C92)'
Escaping is done by
bash itself, so it works for every command. In other words, it's
bash which decides what to pass to the command, based on its own parsing rules, the command then acts on the arguments after
bash has parsed them.