How can I get rid of my old statuses from showing on notification?

[Rebecca]

These are the steps to delete old post from your timeline:-
1-You must know what your Timeline looks like to public users(anyone who is not your Facebook friend).
Follow these instruction:-
--Go to your Timeline,
--click on the gear icon to the right of the Activity Log,
--choose “View as”

Simply click respective date wher eyou want to change and make it “Public” to “Friends,” “Only Me,” or “Custom.”

2
--Click on the arrow in the top-right on Facebook,
--choose Privacy Settings, scroll down, and
--click on Manage Past Post Visibility.

It will show you popup message; click on the blue “Limit Old Posts” button to change the visibility of all your old posts to just “Friends”:

These below image will help you to make it possible in easy way.