I got 84percent in 12th in hpboard so can i get admission in any college under pu with army quota too?

Congratulations! 84% is a good score. In order to apply in Punjab University minimum 50% marks are required. However, to get into most courses minimum 80% is required. You will most probably be able to get into one or the other course with your score.  As far as Defence quota is concerned total 5% seats are reserved for the following:

1. Sons/Daughters/Spouses of such defence personnel, para-military personnel like CRPF/BSF, Police personnel etc. who died in action while on duty. In this case only those who were completely dependent on such personnel will be considered.

2. Sons/Daughters/Spouses  who are wholly dependent on  Defence Personnel who were incapacitated/died while in service.

3. Sons/ Daughters/ spouses of ex-servicemen who were wholly dependent on them.

4. Defence personnel incapacitated while in service.

5. Sons/ Daughters/ Spouses of of serving defence personnel and para-military personnel like CRPF/BSF etc. who are completely dependent on them.

6. Ex- servicemen.

7. Serving defence personnel/ paramilitary personnel like CRPF/BSF etc.