I want to use the hstore type in postgresql.

Environment
CentOS Release 6.8
I installed it with contrib...yum, but the folder contrib is not created in pgsql.
When you type the psql command, psql (8.4.xx, server 9.1.xx) appears.
Is the postgresql version probably 9.1?

I forgot to mention that I have created two database clusters so that I can use two postgres.Change the port

I would like to use hstore in postgresql.
I put yum install postgresql-contrib.x86_64 which seems to contain hstore.control in yum.
In order to re-enable the hstore type,
Create EXTENSION hstore; but
ERROR: could not open extension control file "/path/extension/hstore.control": ENOENT
It is said that there is no file.

When I actually checked the file, it was not found.
Please give me guidance.

Is there anything missing?
There seems to be no hstore data...
I think the installation went well...

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Results
As a result, the psql version seemed to be 8.4 to 9.1, and the 9.1 data seemed to have a different path.
I deleted the previous psql, and after that, I was able to install the hstore type and it worked well, and the hstore type worked without any problems, and everything was solved.
Thank you, everyone.