Like chown33 said, you will need a second account that is admin to do this.
What you can do is make the admin account then operate in your "normal" account, then when the prompt comes up saying admin permission is needed to do something you just type in the user name and password for the admin account while still in the standard account to allow the change.
This way you don't need to jump back and forth between accounts or change the account permission for the standard (normal) account all the time.
That is how I run my Mac. An "admin" account, and a "normal user" account which is the account I use 99.9% of the time. I came to Mac from the Windows world recently and I read that is an extra safe way to do things on Mac, just in case malware tries to install something or modify my system without my permission while I am running as a normal user.
That type of malware is what knocked out one of my Windows XP computers (where the user is the admin) about 7 years ago, it used a security hole in the Adobe PDF reader to eventually install malware
in the hard drive boot sector, very hard to remove. Ransomware from eastern Europe. I didn't want anything like that happening on my Mac.