As she walked down one of the aisles she saw Parahi behind her and noticed he pulled out a mobile phone from his pocket, the summary said.
She then stopped at a display of paintbrushes and other items and was unaware Parahi had kneeled down behind her, grabbed the back of her dress and pulled it slowly towards him.
He then put the mobile phone under the dress and directed his phone up with the intention of taking a photograph, the summary said.
The woman realised what happened and pulled away, and as she did Parahi released her dress from his grip.
On March 7, police searched Parahi's house with the intention of seizing the phone. He said he had an Alcatel phone but inquiries revealed he also had activated a Motorola phone in December 2018.
The summary said Parahi admitted failing to register his phone number with authorities, one of several requirements of being a registered child sex offender.
Parahi became subject to extended supervision orders by the High Court in April 2009 for a period of 10 years.
Those orders were to continue following his release from a short term of imprisonment in November last year.
Part of those orders include not going to licensed premises. The summary said he breached those orders on January 13 by going into the Glassy Junction on Brooklyn Rd in Western Heights, Rotorua.
His lawyer, Scott Mills, told Judge MacKenzie in court yesterday his client acknowledged the breach but did not consume or purchase alcohol while on the premises.
Judge MacKenzie remanded him in custody for sentencing on July 5.