How to backup your iPhone 5?

I have a iPhone 5 and I jailbroken it and I deleted the cydia installer so now cydia doesn't work but I'm asking is there a way to like back up my iPhone using the cloud so I can backup without the jailbreak cuz the jailbreak is making my iPhone slow and I don't have a laptop so Moreless the jailbreak is stopping me from restoring my iPhone please help me I really need to restore my phone

ICloud and iTunes can back up most data on your iPhone, iPad, or iPod touch.
iCloud automatically backs up the most important data on your device using iOS 5 or later. After you have enabled Backup on your iPhone, iPad, or iPod touch in Settings > iCloud > Backup & Storage, it will run on a daily basis as long as your device is:

Connected to the Internet over Wi-Fi
Connected to a power source
Screen locked

You can also back up manually whenever your device is connected to the Internet over Wi-Fi by choosing Back Up Now from Settings > iCloud > Storage & Backup

Get a app that is called lookout its a free antivirus and it backups you're phone, also if you lose you're phone or you're batary died if sends a signal flair telling u wher was you're phone when the battery died

You will need a computer to backup. You use iTunes to do it. Oh & deleting Cydia after a jailbreak makes no sense, since that is what you jailbreak to get access to in the 1st place.

If you afraid of the data missing, you can try to use Wondershare Dr. Fone. That I always try do get my useful data back