How to access apex data from sqlplus?

I have setup an oracle database in my Ubuntu machine. Now I have took the following steps to create tables

1) login to my ubuntu account

2) su oracle

3) sqlplus "sys as sysdba"
//Connected to an idle instance

4) sql prompt sql>startup

Connected to:
Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production
With the Partitioning, OLAP, Advanced Analytics and Real Application Testing options

5) in sql prompt.. sql> exec dbms_xdb_config.sethttpport(8080);

6) sql> exit

7)lsnrctl start

Then I have login to oracle apex in a workspace which I created earlier and created a table named person

but when I again login to to sqlplus like sqlplus "sys as sysdba" and run the following query

select * from person
It says , no table created.

I am a newbie in database , so please tell me how do I access the tables I have created in apex , from sqlplus console ? It used to be so simple in 10g.